# cs java
> The `java` and `java-home` commands fetch and install JVMs. The `java` command runs them too.
> More information: <https://get-coursier.io/docs/cli-java>.
- Display Java version by using coursier:
`cs java -version`
- Call a specific Java version with custom properties using coursier:
`cs java --jvm {{jvm_name}}:{{jvm_version}} -Xmx32m -X{{another_jvm_opt}} -jar {{path/to/jar_name.jar}}`
- List all the available JVM in the coursier default index:
`cs java --available`
- List all the installed JVM in the system with his own location:
`cs java --installed`
- Set a specific JVM as one-off default for the shell instance:
`cs java --jvm {{jvm_name}}:{{jvm_version}} --env`
- Revert the changes for the default JVM settings:
`eval "$(cs java --disable)"`
- Set a specific JVM as default for the whole system:
`cs java --jvm {{jvm_name}}:{{jvm_version}} --setup`
